Auxiliary pull-down motion for looms



@b. M, 1935. .1. w. M D-ANHEL AUXILIARY PULL DOWN MOTION FOR Looms Filed June 28, 1934 5 Sheets-Sheet l Invenior dm flanz'ei flllorney eh, H, 1936. J. w. M DANIEL AUXILIARY PULL-DOWN MOTION FOR LOOMS Filed June 28, 1934 3 Sheets-Sheet 2 Inuenior Fan/Z914 Feb M, 1936. I MCDANIEL 2,030,600

AUXILIARY PULL-DOWN MOTION FOR LOOMS 7 Filed June 28, 1934 3 Sheets-Sheet 5 Patented Feb. 11, 1936 UNITED STATES PATENT OFFICE AUXILIARY PULL-DOWN MOTION FOR LOOMS This invention relates to what may be termed an auxiliary pull down motion adapted for use on any and all types of looms for the purpose of making open places or skips in certain weaves, and which is adjustable to vary the sizes of the open places or skips.

The invention, together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Fig. 1 is a diagrammatic side view with parts in section showing the application of the invention to one form of loom.

Fig. 2 is a diagrammatic front view of Fig. 1.

Fig. 3 is a view of pawl carrying wheel.

Fig. 4 is a view of a hook link used for connecting a cable to a jack.

Fig. 5 is a diagrammatic side view showing the application of the invention to another type of loom.

Fig. 6 is a front view of parts shown in Fig. 5.

In these drawings, the beam containing the warps is shown at l and its head at 2, the warps passing over the guide roller 3 through the heddle in the usual manner and after being interwoven with the weft threads pass to the sand roll 4 which is driven by a chain of gearing shown generally at 5 from the drive pinion 6 which is driven from any suitable source of power by the worm gearing 1 controlled by the clutch means 8. A ratchet wheel 9 is associated with the pinion and in carrying out my invention I provide a wheel In which is loosely mounted on the shaft of the pinion, and said wheel carries a dog or pawl II for engaging the ratchet wheel 9. This wheel is of pulley-like form and one end of the cable I2 is connected with the wheel and said cable passes over the guide rolls or pulleys l3 to a dobby jack I4. A second jack I5 is connected by a cable IE to the brake or tension member I! of the beam, said member ll passing around the head as shown in Fig. 1 and having its lower end attached to a stationary part. Each cable is connected by a hook link l9, shown more particularly in Fig. 4, to the jack and each jack is provided with vertical rows of notches 20, receiving the loop 2| of the link so that the cable can be adjustably connected with the jack.

A spring 22 is attached to a stationary part of the loom and a cable 23 connects the spring with the wheel I0 so that the spring acts to hold the parts in a neutral position, to permit the ordinary operation of the loom. However, when the jacks I4 and I5 are operated, the jack I4 exerts a pull upon the cable I2 to give the wheel ID a partial revolution which causes the dog H to move the ratchet wheel 9 and pinion 6, thus causing movement of the sand roll 4 to move the the warps to a greater extent than during the normal operation of the loom. Thus a space is formed in the fabric or weave during this movement of the warps as the wefts are not interwoven with the warps, the space being of a width equal tov the amount of movement given the sand roll by the movement of the wheel by the jack. By adjusting the link l9 from the jack or by using different sizes of wheels [0 or 9, the spaces in the fabric can be adjusted as to their widths.

At the same time the wheel 10 is being moved by the jack M, the jack I5 is relieving the tension of the beam head so that the warps can be readily moved from the beam by the movement of the sand roll under the action of the wheel Ill. The spring 22 acts to. return the parts to normal position after the jack I4 returns to normal position and the jacks are operated in the usual manner.

Figs. 5 and 6 show the invention on a type of loom in which the parts are driven from the ratchet wheel 25 which is given a step-by-step movement from the sword 26 throughmeans of the lever 21 carrying the dog 28, the connection between the sword and. the lever being shown at 29 and in this case, the wheel III has its dog I I engaging the ratchet wheel 25. In other respects, the application of the invention is similar tothat first described.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

I claim:

1. In a loom including a warp beam and a sand roll, and. means for rotating the roll including a ratchet wheel, a dog carrying wheel rotatably supported adjacent the ratchet wheel, and the dog of which engages the ratchet wheel, a dobby jack, a cable connecting the same to the dog carrying wheel, and spring means connected with the dog carrying wheel for returning the parts to normal position.

2. In a loom including a warp beam and a sand roll, means for rotating the roll including a ratchet wheel, a dog carrying wheel rotatably supported adjacent the ratchet wheel, and the dog of which engages the ratchet wheel, a dobby jack, 2. cable connecting the same to the dog carrying wheel, and spring means connected with the dog carrying wheel for returning the parts to normal position, a second dobby jack and cable connecting the same to the tension means of the beam for releasing said tension as the dog carrying wheel is being operated.

JAMES WILLIAM McDANIEL. 

